- Preheat the oven to 375°F (190°C). 
- In a large bowl, combine the sliced mushrooms, chopped onion, minced garlic, thyme, rosemary, salt, and pepper. 
- Drizzle the olive oil over the mushroom mixture and toss to coat evenly. 
- In a baking dish, arrange the chicken breasts in a single layer. Pour the mushroom mixture over the chicken. 
- In a small bowl, mix the chicken broth and lemon juice, then pour it over the chicken and mushrooms. 
- Cover the baking dish with aluminum foil and bake for 25 minutes. 
- Remove the foil and bake for an additional 15-20 minutes, or until the chicken is cooked through (internal temperature should reach 165°F). 
- Remove from the oven and let it rest for 5 minutes before serving. Garnish with fresh parsley.